package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.properties.SearchHttpProperties;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.sky.utils.HttpClientUtil;
import java.util.HashMap;
import java.util.Map;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

@Service
@Transactional(rollbackFor = Exception.class) // 添加事务注解
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 提交订单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        // 1.判断是否提交了用户地址
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            // 抛出异常处理
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 检查用户的收货地址是否超出配送范围(因为ak还在申请中 所以关闭了此功能)
        // checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        // 2.判断是否提交了订单菜品信息
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        // 2.1调用Mapper 获取当前用户购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.isEmpty()) {
            // 抛出异常处理
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 3.向订单表插入1条数据
        // 3.1构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        // 3.2保存订单数据
        orderMapper.insert(order);

        // 4.向订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        // 4.1批量插入订单明细数据
        orderDetailMapper.insertBatch(orderDetailList);

        // 5.清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        // 6.返回数据
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        // 通过WebSocket向客户端浏览器推送消息(因为支付功能用不了 所以把这个功能放在这了)
        Map<String, Object> map = new HashMap<>();
        map.put("type", 1); // 1:来单提醒 2:顾客催单
        map.put("orderId", order.getId());
        map.put("content", "订单号：" + order.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    @Override
    
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        // 调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), // 商户订单号
                new BigDecimal(0.01), // 支付金额，单位 元
                "苍穹外卖订单", // 商品描述
                user.getOpenid() // 微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    @Override
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 历史订单
     *
     * @param page
     * @param pageSize
     * @param status   订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @return
     */
    @Override
    public PageResult pageQuery(Integer page, Integer pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(page, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> pageInfo = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && pageInfo.getTotal() > 0) {
            for (Orders orders : pageInfo) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(pageInfo.getTotal(), list);
    }

    /**
     * 查询订单详情
     *
     * @param id 订单id
     * @return
     */
    @Override
    public OrderVO getOrderDetail(Long id) {
        OrderVO orderVO = new OrderVO();
        // 根据订单id查询订单数据
        Long userId = BaseContext.getCurrentId();
        Orders orders = orderMapper.getByIdAndUserId(id, userId);
        BeanUtils.copyProperties(orders, orderVO);
        // 根据订单id查询菜品数据
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }


    /**
     * 取消订单
     *
     * @param id 订单id
     * @return
     */
    @Override
    public void cancel(Long id) throws Exception {
        // 根据id查询订单
        Long userId = BaseContext.getCurrentId();
        Orders orders = orderMapper.getByIdAndUserId(id, userId);
        // 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        // 判断订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 如果在2.待接单状态下，退款给用户
        if (Objects.equals(orders.getStatus(), Orders.TO_BE_CONFIRMED)) {
            // 调用微信支付退款接口
            weChatPayUtil.refund(
                    orders.getNumber(), // 商户订单号
                    orders.getNumber(), // 商户退款单号
                    new BigDecimal(0.01),// 退款金额，单位 元
                    new BigDecimal(0.01));// 原订单金额

            // 支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 判断订单状态(如果状态在3.已经接单、4.派送中状态下，用户取消订单需要电话沟通商家)
        if (orders.getStatus() > Orders.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 修改订单状态为已取消、取消原因
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(MessageConstant.ORDER_USER_CANCELORDER);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id 订单id
     * @return
     */
    @Override
    public void repetitionById(Long id) {
        Long userId = BaseContext.getCurrentId();
        // 根据订单id查询当前订单
        Orders orders = orderMapper.getByIdAndUserId(id, userId);
        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 判断订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 将订单详情数据批量插入到购物车表
        ShoppingCart shoppingCart = new ShoppingCart();
        // 添加前先删除之前的购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        for (OrderDetail item : orderDetailList) {
            BeanUtils.copyProperties(item, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 分页设置
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders orders : page) {
            Long orderId = orders.getId(); // 订单id
            // 查询订单明细
            OrderVO orderVO = new OrderVO();
            List<String> OrderDishes = new ArrayList<>();
            List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
            for(OrderDetail item : orderDetails){
                String name = item.getName();
                Integer number = item.getNumber();
                OrderDishes.add(name + "* " + number);
            }
            BeanUtils.copyProperties(orders, orderVO);
            orderVO.setOrderDishes(String.join(",", OrderDishes).replace(",", "; "));
            orderVO.setOrderDetailList(orderDetails);
            orderVOList.add(orderVO);
        }
        return orderVOList;
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO getOrderStatistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = OrderStatisticsVO.builder()
                .toBeConfirmed(toBeConfirmed)
                .confirmed(confirmed)
                .deliveryInProgress(deliveryInProgress)
                .build();
        return orderStatisticsVO;
    }

    /**
     * 查询订单详情
     *
     * @param id 订单id
     * @return
     */
    @Override
    public OrderVO getOrderDetailById(Long id) {
        OrderVO orderVO = new OrderVO();
        // 根据订单id查询订单数据
        Orders orders = orderMapper.getById(id);
        BeanUtils.copyProperties(orders, orderVO);
        // 根据订单id查询菜品数据
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 确认订单 - 接单
     *
     * @param ordersConfirmDTO 包含id、订单id
     * @return
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /**
     * 取消订单 - 拒单
     *
     * @param ordersRejectionDTO
     * @return
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());

        // 判断订单的状态(只有待接单状态下，才能拒单)
        if (!Objects.equals(orders.getStatus(), Orders.TO_BE_CONFIRMED)) {
            // 订单状态不正确
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 判断用户是否完成了支付
        if (Objects.equals(orders.getPayStatus(), Orders.PAID)) {
            // 用户已支付，需要退款
            weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
        }

        // 修改订单状态为已取消、拒单原因、拒单时间
        orders.setId(ordersRejectionDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单 - 取消
     * @param ordersCancelDTO
     */
    @Override
    public void adminCancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());

        // 判断用户是否完成了支付
        if (Objects.equals(orders.getPayStatus(), Orders.PAID)) {
            // 用户已支付，需要退款
            weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @return
     */
    @Override
    public void deliveryById(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);

        // 判断订单状态(只有在“已接单”中才可以执行派送订单)
        if(!Objects.equals(orders.getStatus(), Orders.CONFIRMED)){
            // 订单状态不正确
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 修改订单状态为派送中
        orders.setId(orders.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id 订单id
     * @return
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);

        // 判断订单状态(只有在“派送中”中才可以执行完成订单)
        if(!Objects.equals(orders.getStatus(), Orders.DELIVERY_IN_PROGRESS)){
            // 订单状态不正确
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 更新订单状态,状态转为完成
        orders.setId(orders.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address 收货地址
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        SearchHttpProperties searchHttpProperties = new SearchHttpProperties();
        map.put("address",address);
        map.put("output","json");
        map.put("ak",searchHttpProperties.getAk());

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /**
     * 顾客催单
     * @param id 订单id
     * @return
     */
    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        // 判断订单状态(只有在“待接单”、“待派送”、“派送中”中才可以执行催单)
        if(Objects.equals(orders.getStatus(), Orders.PENDING_PAYMENT) ||
                Objects.equals(orders.getStatus(), Orders.CONFIRMED) ||
                Objects.equals(orders.getStatus(), Orders.DELIVERY_IN_PROGRESS)){
            // 订单状态不正确
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 通过WebSocket向客户端浏览器推送消息
        Map<Object, Object> map = new HashMap<>();
        map.put("type", 2); // 1:来单提醒 2:顾客催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号:" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

}
